Hello,
I would use Project Area inheritance:
1 - create a PA - MASTER
and put my queries there


2 - make this master PA shareable
3 - create n Project Areas using Unconfigured Template and have them inherit from MASTER PA

Though untested, assuming this should work.

See https://jazz.net/help-dev/clm/topic/com.ibm.jazz.platform.doc/topics/c_sharing_project_area_process.html

I think of this as this only way to share queries between PAs, as different PAs might have different level of customization (ex: different custom attributes), which might make a query in PA1 not compatible with data in PA2

Hope it helps.
Eric.